package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class SetmealServiceImpl implements SetmealService {

    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private DishMapper dishMapper;

    /**
     * 新增套餐
     *
     * @param setmealDTO
     */
    public void save(SetmealDTO setmealDTO) {

        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);
        //向套餐表插入数据
        setmealMapper.insert(setmeal);

        //获取新增套餐的id
        Long setmealId = setmeal.getId();
        // 批量插入套餐和菜品的关联数据
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealId);
        });
        //批量插入套餐菜品数据
        setmealDishMapper.inseteBatch(setmealDishes);

    }

    /**
     * 分页查询
     *
     * @param setmealPageQueryDTO
     * @return
     */
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        int pageNum = setmealPageQueryDTO.getPage();
        int pageSize = setmealPageQueryDTO.getPageSize();

        PageHelper.startPage(pageNum, pageSize);
        Page<SetmealVO> page = setmealMapper.pageQuery(setmealPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }

    /**
     * 批量删除套餐
     *
     * @param ids
     */
    public void delete(List<Long> ids) {
        //判断套餐是否停售，起售套餐不可删除
        ids.forEach(id -> {
            Setmeal setmeal = setmealMapper.getById(id);
            if (setmeal.getStatus() == StatusConstant.ENABLE) {
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        });
/*        ids.forEach(stetmealId -> {
            //删除套餐表中的数据
            setmealMapper.deleteById(stetmealId);
            //删除套餐关系表中的数据
            setmealDishMapper.deleteBySetmealId(stetmealId);
        });*/
        //删除套餐表中的数据
        setmealMapper.deleteById(ids);
        //删除套餐关系表中的数据
        setmealDishMapper.deleteBySetmealId(ids);
    }

    /**
     * 根据id查询套餐和菜品
     *
     * @param id
     * @return
     */
    public SetmealVO getByIdWithDish(Long id) {
        // 根据id查询套餐数据
        Setmeal setmeal = setmealMapper.getById(id);
        List<SetmealDish> setmealDishes = setmealDishMapper.getBySetmealId(id);

        //将查询的口味数据封装到SetmealVO中
        SetmealVO setmealVO = new SetmealVO();
        BeanUtils.copyProperties(setmeal, setmealVO);
        setmealVO.setSetmealDishes(setmealDishes);
        return setmealVO;
    }

    /**
     * 修改套餐
     *
     * @param setmealDTO
     */
    public void update(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);

        //修改套餐表数据
        setmealMapper.update(setmeal);

        //套餐id
        Long setmealId = setmealDTO.getId();

        //删除原有的 套餐和菜品的关联数据
        setmealDishMapper.deleteForSetmealId(setmealId);
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        if (setmealDishes != null && setmealDishes.size() > 0) {
            setmealDishes.forEach(setmealDish -> {
                setmealDish.setSetmealId(setmealId);
            });
        }

        //插入新的套餐和菜品的关联数据
        setmealDishMapper.inseteBatch(setmealDishes);

    }

    /**
     * 起售停售套餐
     *
     * @param status
     * @param id
     */
    public void startOfStop(Integer status, Long id) {
        //起售套餐时，判断套餐内是否有停售菜品，有停售菜品时不能起售
        if (status == StatusConstant.ENABLE) {
            //查询套餐内是否有停售菜品
            List<Dish> dishList = dishMapper.getBysetmealId(id);
            if (dishList != null && dishList.size() > 0) {
                dishList.forEach(dish -> {
                    if (dish.getStatus() == StatusConstant.DISABLE) {
                        throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                    }
                });
            }
        }
        Setmeal setmeal = Setmeal.builder()
                .id(id)
                .status(status)
                .build();
        setmealMapper.update(setmeal);
    }

    /**
     * 条件查询
     *
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }
}
